58 lines
2.1 KiB
Python
58 lines
2.1 KiB
Python
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import warnings
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from django.core.exceptions import FullResultSet
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from django.db.models.expressions import OrderByList
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from django.utils.deprecation import RemovedInDjango61Warning
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class OrderableAggMixin:
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# RemovedInDjango61Warning: When the deprecation ends, replace with:
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# def __init__(self, *expressions, order_by=(), **extra):
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def __init__(self, *expressions, ordering=(), order_by=(), **extra):
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# RemovedInDjango61Warning.
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if ordering:
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warnings.warn(
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"The ordering argument is deprecated. Use order_by instead.",
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category=RemovedInDjango61Warning,
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stacklevel=2,
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)
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if order_by:
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raise TypeError("Cannot specify both order_by and ordering.")
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order_by = ordering
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if not order_by:
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self.order_by = None
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elif isinstance(order_by, (list, tuple)):
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self.order_by = OrderByList(*order_by)
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else:
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self.order_by = OrderByList(order_by)
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super().__init__(*expressions, **extra)
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def get_source_expressions(self):
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return super().get_source_expressions() + [self.order_by]
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def set_source_expressions(self, exprs):
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*exprs, self.order_by = exprs
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return super().set_source_expressions(exprs)
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def as_sql(self, compiler, connection):
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*source_exprs, filtering_expr, order_by_expr = self.get_source_expressions()
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order_by_sql = ""
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order_by_params = []
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if order_by_expr is not None:
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order_by_sql, order_by_params = compiler.compile(order_by_expr)
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filter_params = []
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if filtering_expr is not None:
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try:
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_, filter_params = compiler.compile(filtering_expr)
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except FullResultSet:
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pass
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source_params = []
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for source_expr in source_exprs:
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source_params += compiler.compile(source_expr)[1]
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sql, _ = super().as_sql(compiler, connection, order_by=order_by_sql)
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return sql, (*source_params, *order_by_params, *filter_params)
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